They seem to be 640x480, as you say better than nowtSorry to hear that buddy :-(
I've got one, 7mm IIRC, image quality is very much "early webcam" rather than blockbuster 4k UHD, but it's ok as it's on yor phone's small screen, and infinitely better than not seeing anything. If you get oil onto the lens they are a bugger to clean, but even if you can't get it clean again, it's such a cheap bit of kit it's almost disposable, as in it costs less than abox of beer, so not a big hit to write it off.